The Staff of the International Ethics Standards Board for Accountants (IESBA) has released two implementation support publications to help sustainability assurance practitioners understand and apply the International Ethics Standards for Sustainability Assurance (including International Independence Standards) (IESSA):
- Key Differences: A comparison document outlining the main differences between the IESSA and the corresponding provisions of the IESBA Code applicable to audits of financial statement.
- List of PIE Prohibitions: A list of specific prohibitions in the IESSA applicable to sustainability assurance engagements of public interest entities (PIEs).
The Key Differences Between IESSA and Parts 1 to 4A of the Code provides an overview of how the IESSA compares to the ethics and independence provisions in the IESBA Code that apply to audits of financial statements. It is intended to support firms that already follow the Code in understanding and implementing the IESSA for sustainability assurance engagements. For reference purposes, the publication is accompanied by a marked-up version of the IESSA showing changes from the corresponding sections of the extant Code.
The List of Prohibitions for PIEs in IESSA summarizes the specific interests, relationships, non-assurance services and other circumstances prohibited under the IESSA when performing sustainability assurance engagements for PIEs. It is intended as a high-level reference to help sustainability assurance practitioners in further understanding the prohibitions in the IESSA.
Jurisdictional standard setters, regulators and oversight bodies, professional accountancy organizations, educational institutions and other stakeholders may also find the publications useful.
These new resources are part of a comprehensive implementation support program the IESBA has put in place—a strategic priority aimed at promoting the adoption and consistent and effective implementation of the IESSA, which becomes effective in December 2026. Led by a dedicated Adoption and Implementation Working Group, this effort includes a growing suite of guidance materials, webinars, and other resources to back the rollout of the Global Ethics Sustainability Standards.
Read the publications on IESBA’s Support and Resources Page
Visit the IESBA Sustainability Focus Page
About IESBA
The International Ethics Standards Board for Accountants (IESBA) is an independent global standard-setting board. The IESBA’s mission is to serve the public interest by setting high-quality, international ethics (including independence) standards as a cornerstone to ethical behavior in business and organizations, and to public trust in financial and non-financial information that is fundamental to the proper functioning and sustainability of organizations, financial markets and economies worldwide.
Along with the International Auditing and Assurance Standards Board (IAASB), the IESBA is part of the International Foundation for Ethics and Audit (IFEA). The Public Interest Oversight Board (PIOB) oversees IESBA and IAASB activities and the public interest responsiveness of the standards.